Damper-regulator.



Patentad Apr. I6, 190i. 8. A. KELLAM.

DAMPER REGULATOR.

(Application filed Sept. 17, 1900.)

(No Model.)

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SAMUEL A. KELLAM, OF NORWOOD, OHIO.

namesaateuraroa.

SPECIFICATION forming part of Letters Patent No. 672,378, dated April16, 1901.

Application filed september 17, 1900. Serial No. 30,256. (No model.)

To all whont it may concern.-

Be it known that I, SAMUEL A. KELLAM, a citizen of the United States ofAmerica, and a resident of Norwood, in the county of Hamilton and Stateof Ohio, have invented certain new and useful Improvements in Damper-Regulators, of which the following is a specification.

This invention relates to certain improvements in that class ofdamper-regulators of which the device set forth and claimed in theUnited States Letters Patent No. 637,125, granted November 14, 1899, toS. A. Kellam and J. B. Bischoff, is a type; and the object of theinvention is to provide a device of this character of animproved andsimplified construction having improved means for controlling theoperation of the valve by means of which steam is supplied to theoperative parts of the device.

The invention consists in certain novel features of the construction,combination, and arrangement of the several parts of the improvedregulator, whereby certain important advantages are attained and thedevice is made simpler, cheaper, and otherwise better adapted and moreconvenient for use, all as will be hereinafter fully set forth.

The novel features of the invention will be plane indicated by the lineb b in Fig. 4. Fig.

3 is a partial section taken axially through the central part of thedevice in a plane at right angles to Fig. 2, as indicated by the line aa in said figure. Fig. 4is a transverse section taken through the lowerpart of the device in the plane indicated by the line 0 c in Fig. 2.Fig. 5 is an enlarged sectional detail View showing the connectionbetween the spring and its adjusting-rod. Fig. 6 is an enlarged detailview showing the means for guiding the lower end of the spring toprevent turning or twisting thereof in the spring barrel or casing. Fig.7is an enlarged detail View showing the cap for holding the swivelconnection for the lower end of the spring to the adjusting-rod.

As shown in the drawings, the improved damper regulator is supportedupon a bracket-plate 1, adapted for attachment in any convenientposition and having an arm 2 extended at right angles from it, theextremity of said arm havinga bearing 3 for the device, the upper partof which comprises a hollow piston 4, supported above arm 2 and carryingan inclosing cylinder 5, the upper end 6 of which is adapted forconnection with the damper to be regulated in a well-known way. Thesedevices form no part of my presentinvention, and I have not, therefore,illustrated them in detail herein. The construction of these parts isclearly shown and described in the above-named patent to Kellam andBischoff.

The lower end of the piston 4 has a plain portion 7,which is extendedthrough the opening of the bearing 3 of arm 2 and is of a length toextend somewhat below the under side of said hearing. The lower endportion of said plain part 7 is externally screw-threaded, as shown at8, to receive a nut 9, screwed thereon, and below said nut said threadedportion 8 serves to receive a valve-casing 10, having a central raisedannular valve-seat 11, whereby an annular chamber 12 is formed in thecasingsurrounding said seat 11 and adapted for communication with thebore of the piston 4, as will be readily understood. The wall of thevalve-casing 10 is perforated at its front side, as shown atthe right inFigs. 1 and 3, for the passage of a drip-cock 13 for the escape of waterof condensation from the valve-chamber and from the piston 4 andcylinder 5. The passage through said cook 13 is controlled by a screw14, as clearly shown in Fig. 3.

16 indicates the valve seated upon the seat 11 of the valve-casing 10and provided at its lower part with guides 17, adapted to play in theport of said casing 10, so as to guide the valve in its verticalmovements. The valve is provided with an axial passage through which isextended a valve-rod 18, provided at its upper end with a rounded heador enlargement 19, held in an enlarged part of the opening in the bodyof the valve and adapted to stand when the valve is seated, as shown inFig. 3, directly in line with the valve-seat. This arrangement of theparts affords sufficient movement of the valve upon the valverod topermit the valve to properly seat itself when drawn down and at the sametime prevents the valve from being lifted or tilted from its seat fromany slight movement imparted by the valve-rod 18. The chamberin thevalve through which the rod 18 is inserted is open at the top of thevalve and serves to receive a screw-plug 20, having a head 21, providedwith a kerf or cut to receive a screwdriver or the like in order thatthe valve may be conveniently removed for the purpose of grinding.

The casing 10 is provided in its lower part. with a chamber22, separatedfrom the chamber 12 by a transverse partition through which, thesteam-port is extended, and to said chamber 22 steam is admitted at oneside by way of a pipe 23. At the opposite side of the}, chamber anotherpipe 24, provided with a: valve, affords a drip-outlet for watercondensing below the valve 16 and also for con--' densation from thesteam-pipe 23. The lower end of casing 10 is interiorlyscrew-threaded,;. as shown at 25, to receive the upper end of a springbarrel or casing26, made in tubular form and having at its lower end areduced" neck 27,- carrying a stuffing-box 28, through: which is passedthe lower end of an adjusting-rod 29, the lower extremity of which has,,as shown in Figs. 1 and 2, a hand-Wheel 30,, so that the rod may beconveniently turned to adjust the tension upon the valve 16. The:central part of the adjusting-rod is screwthreaded, as shown at 31 inFig. 2, and has engagement with threads in the neck 27 in, such a waythat when the adjusting-rod 29 is turned by means of its hand-wheel 30iongitudinal movement is imparted to said rod.. The upper end of the rodis alsoscrew-threaded to receive ascreW-cap 32, screwed thereon as shownin Figs. 2 and 5, said cap having a: chamber 33, in which is held toturn the enlarged or headed lowerend 35 of a swivel con nection, theupper part of which is made flattened, as shown at 36, and is extendedthrough, the upper end of the cap 32, which is pro-- vided with acircular opening 34:, as clearly shown in Fig. 7, through which openingthe part 36 passes and may turn relatively to v the cap.

A squared block 39 is held on the flattened end 36 of the swivelconnection, said block having the form shown in Figs. 2, 5, and 6 andbeing provided with a central elongated opening 40 for the passage ofthe said flattened end 36, so that said squared block is therebysecurely held against turning movement on the swivel. The block 39 isadapted for sliding vertical movement in a guidesleeve 41 of rectangularcross-section and arranged wit-hin the bore or chamber of the easing 26,with the axis of which it is alined. 37

(waste indicates a helical spring, also arranged within the guide-sleevet1, having its upper end connected to the lower end of the valve-rod 18,as shown at 38, by a detachable connection and its lower end connectedto the flattened end 36 of the swivel, by means of which said spring iscoupled to the upper end of the adjusting-rod 29; but said adjusting-rodis permitted to turn relatively to the spring, while the spring itselfis held securely against turning movement in the guide-sleeve by reasonof the engagement therewith of the squared block 39, carried by theswivel.

In operation the steam being admitted to the chamber 22 exerts itspressure beneath the valve 16 and tends to raise the same from its seat,the tension of the spring 37 opposing the lifting movement of the valveuntil the steam-pressure rises sufficiently to overcome the tension ofthe spring, whereupon the valve 16 is lifted and the steam flows fromchamber of casing 10 and thence passes up into the bore of the piston 4to exert its pressure for lifting the cylinder 5, the movement of saidcylinder being communicated to the damper in a Well known way to actuatesaid damper to control the furnace drafts. The chamber of the casing 26,wherein the-spring 37 is located, is in communication with thesteam-chamber 22, so that no extraneous resistance more than the tensionof the spring, suchas would be caused by packing for the valve-rod 18 orequivalent part, is exerted upon the valve, and consequently the devicemay be set to permit the valve to lift exactly at the desired pressure.The screw-threaded adjusting-rod 29 also affords an extremely simple andconvenient means for adjusting the tension exerted upon the valve by thespring37, and theswivel connection, together with the block 39 andguidetl, affords a very convenient means for preventing twisting of thespring or turning and consequent derangement of the valve when the rod29 is turned to vary the spring tension. The dripopenings above andbelow the valve also-serve to drain the device of Water of condensation,which by collecting in thesteam-spaces of the device would seriouslyinterfere with the proper operation of the device, and the connection ofthe device to the bracket 1 is such. 1 that all of the parts whichordinarily require attention and repair are located below thebracket-arm 2 and may be removed therefrom together orsingly forpurposes of repair or cleaning without necessitating the removal 1 ofthe parts above the bracket, which are more difficult to handle byreason of their Weight.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. In a damper-regulator the combination of a piston, a cylinder, avalve-casing provided with a port for admission of steam, a valve withinthe valve-casing, a steam-pipe the chamber 22 through the port to thevalvewaste arranged for communication with the steamport of the valvecasing, a spring-casing detachably connected to the valve-casing andextended below said steam-pipe and adapted to receive water ofcondensation therefrom, an adjusting means having threaded engagementwith the spring-casing, a spring in the spring-casing and strainedbetween and having at its ends swiveled connection both with the valveand said adjusting means,and means engaged with both the spring and thespringcasing for preventing the spring from turning in said casing,substantially as set forth.

2. In a damper-regulator, the combination of a piston, a cylinder, avalve-casing having a valve, an adjusting means, a spring-casingdetachably connected to the valve-casing and with which the adjustingmeans has threaded engagement, a spring strained between and having atits ends swiveled connection both with the valve and said adjustingmeans, an angular guide-sleeve within the spring-casing, and a deviceheld against turning movement relative to the said spring and engagedwith the guide-sleeve in the spring-casing to hold the spring againstturning in said casing, substantially as set forth.

3. In a damper-regulator, the combination of a bracket having an armprovided with a bearing, a cylinder, a piston extended above thebracket-arm and having a lower portion held by the bearing of thebracket-arm, a valve-casing detachably connected to the piston below thebracket-arm, a valve in said casing, means to admit steam to the casingand a tension device connected to the valve, substantially as set forth.

4. I11 a damper-regulator, the combination of a bracket having an armprovided with a bearing, a cylinder, a piston extended above thebracket-arm and having a lower portion held by the bearing of thebracket-arm and extended below said arm, a valve-casing having threadedengagement with the extended portion of the piston below thebracket-arm, a valve in said casing, means to admit steam to the casingand a tension device connected to the valve, substantially as set forth,

5. In a damper-regulator the combination of a valve-casing having asteam-port, a valve controlling said port, a spring-casing connected tothe valve-casing, an adjusting-rod having threaded engagement with thespringcasing, a cap held on the adjusting-rod in the spring-casing andhaving a central opening, a swivel having an enlarged part held betweenthe cap and adjusting-rod and formed with a reduced portion extendedthrough the central opening of the cap and adapted for free turningmovement relatively to the adjusting-rod, a guide in the spring-casing,a part held against turning movement on. the swivel and engaged with theguide and a spring having one end connected to the swivel and itsopposite end connected to the valve to hold the same pressed on itsseat, substantially as set forth.

6. In a damper-regulator the combination of a bracket having an armprovided with a bearing, a cylinder, a piston above the bracket-arm andhaving a lower portion extended through the bearing of the bracketarmand projected below said arm, a valvecasing detachably held on theprojecting lower portion of the piston below the bracketarm and providedwith a steam-port, a valve in said valve-casing and controlling saidport, a spring-casing detachably connected to the valve-casing, anadjusting-rod having threaded engagement with the spring-casing and aspring held in the spring-casing and having at one end connection withthe adj nsting-rod and at its opposite end connection with the valve tohold the same pressed on its seat, substantially as set forth.

Signed at Cincinnati, Ohio, this 14th day of September, 1900.

SAMUEL A. KELLAIWL Witnesses:

JOHN ELIAS Jonas, L. M. J ONES.

